The jets intercepted the Kitfox Model 2, a kit airplane, piloted by Myrtle Rose of South Barrington, a Chicago suburb. Rose turned the plane around and returned to Mill Rose Farm Airport, NORAD spokesman Lt. Michael Humphreys said.

Rose’s plane didn’t have a radio, which forced NORAD to use the jets to identify and intercept the plane, Humphreys said.

With such temporary flight restrictions, “there are no lines drawn in the air. It’s sometimes a little hard to tell where you’re at,” NORAD spokeswoman Stacey Knott told the newspaper. “Typically, it’s just a mistake.”

Rose didn’t appear shaken after the incident, Deputy Police Chief Ray Cordell said. “She was unaware that she had entered restricted air space,” Cordell said. “Surprised was probably the right term.” Calls to a listing for Rose in South Barrington rang unanswered Thursday. The town, home to about 4,500 residents, is outside of Chicago. “We do not have fighter jets flying over the village very often,” Cordell said.